Features: ESP32S3-SIM7670G-4G is multifunctional microcontroller development board build-in SIM7670G 4G communication module. Adopts the ESP32S3R2 chip, which integrates low-power WiFi and BLE5.0, onboards external 16MB Flash and 2MB PSRAM Hardware encryption accelerates, random number generating, HMAC, and digital signs module to meet the security requirements of the IoTs. Equipped with SIM7670G Cat-1 4G communication module to achieve mobile networking connection and meet the low-power requirements of IoTs, mobile devices, outdoor monitorings, smarthomes, and other applications. Adopts ESP32S3R2 chip with highperformances 32bit LX7 Twocore processor, capable of running at 240MHz With 512KBSRAM, 384KB, 2MB of PSRAM, and 16MB Flash memory Integrated 2.4GHz WiFi and BluetoothcompatibleLE twomode wireless communication Specifications: Item：ESP32S3-SIM7670G-4G Development Board Chip：ESP32S3R2 Support: WiFi and BLE5.0 Cat-1 4G Battery:18650 battery is NOT included Size：as shown Package Includes: 1Set ESP32S3-SIM7670G-4G Development Board note: Due to the problemsof lighting effects and shootingangles, there mightbe certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment.